ORIGINAL: Psikelly
DD = direct drive It uses a slightly larger motor.I think its a GWS IPS50 or 100. Sorry I forget.
I was thinking because of the largr motor and the fact that it can take a little more current that it might have a longer life soan than stock tail motors. It MIGHT be a little longer ,has pretty good tail authority but it still burns out pretty quickly. You use the stock motor mount, buy a GWS motor and prop and a special prop adapter. The money diff. between the DD and dual motor isnt a lot so your better to go with the dual motors. BUT if youre planning on staying with the stock battery and motor then DD is a good upgrade I think
The DD motor is a GWS H50, which is not an IPS motor. I've never tried the dual motor, but have had the same H50 on my blade for over eight months. I think it is starting to weaken a little, but still flies great. I keep threatening to go brushless when and if it ever fails, so I think it's just hanging on out of spite.
I also don't use a prop adapter. I use the small GWS 3020 props which are push-ons. They are very small and light which is why I think my motor has lasted so long. I bought the adapter for the 4" blade but it is now on one of my planes since I didn't use it on the blade. I've heard a lot of mixed emotions over time about the DD mod, but I personally love it. 100 times better than stock, no worries about gear mesh.
Just as a side note, I buy a lot of stuff from Heli-direct. I've never had a problem with anything I've bought from them, but I already new about the differences before I started. I also have a machine shop so making things work is no problem.